import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: GaoBo
 * Date: 2021-04-06
 * Time: 18:36
 */
public class HomeWork {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int age = scanner.nextInt();

        if(age <= 18) {

        }else if(age>=19 && age<=28) {

        }else if(age>=29 && age<=55) {

        }else {

        }
    }

    /**
     * 1.2-15
     * 2.16  a*b   1*16  2*8  4*4    <=16/2  2-8
     * 3.16  a*b   1*16  2*8  4*4    <=根号16 2-4
     * i <= Math.sqrt(n) 这个就是Java当中的开根号
     * @param args
     */
    public static void main5(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int i = 2;
        for (; i <= Math.sqrt(n); i++) {
            if(n % i == 0) {
                System.out.println("不是素数！");
                break;//结束所有的循环
            }
        }
        // 代码能够走到第27行？  1、第一种遇到break  2、i==n
        if(i > Math.sqrt(n)) {
            System.out.println("是素数！");
        }
    }
    public static void main4(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int i = 2;
        for (; i <= n/2; i++) {
            if(n % i == 0) {
                System.out.println("不是素数！");
                break;//结束所有的循环
            }
        }
        // 代码能够走到第27行？  1、第一种遇到break  2、i==n
        if(i > n/2) {
            System.out.println("是素数！");
        }
    }

    /**
     * Java当中的调试！！IDEA
     * @param args
     */
    public static void main3(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int i = 2;
        for (; i < n; i++) {
            if(n % i == 0) {
                System.out.println("不是素数！");
                break;//结束所有的循环
            }
        }
        // 代码能够走到第27行？  1、第一种遇到break  2、i==n
        if(i == n) {
            System.out.println("是素数！");
        }
    }
    public static void main2(String[] args) {
        for (int year = 1000; year < 2001; year++) {
            if(year%4==0 && year%100!=0 || year%400==0) {
                System.out.println(year);
            }
        }
        /*int year = 2020;
        if(year%4==0 && year%100!=0 || year%400==0) {
            System.out.println(year);
        }*/
    }
    public static void main1(String[] args) {
        int count = 0;
        for (int i = 1; i <= 100; i++) {
            if(i % 10 == 9) {
                //个位数上是9
                count++;
            }else if(i / 10 == 9) {
                count++;
            }
        }
        System.out.println(count);
    }
}
